Picture Viewer Pro is a great app to view or run slide show of pics as main feature, which is also few other feature as below.
1. Display images as Slideshow in Windows
2. Set Slide show time in Preferences
3. Can Export as JPEG, PNG,TIFF,JIG, BMP
4. Batch Conversion
5. Watermark can be done in one go
6. Save in desired size
Support: email us at firstname.lastname@example.org